MLA

Kissinger, Henry, 1923-2023. Si. Box 53, folder 2. 1954-1968. https://collections.library.yale.edu/catalog/11783386.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 53, folder 2"])(1954-1968)[Si]. https://collections.library.yale.edu/catalog/11783386.